Back to Search
Start Over
Characterizing decoherence rates of a superconducting qubit by direct microwave scattering
- Source :
- npj Quantum Information, Vol 7, Iss 1, Pp 1-9 (2021)
- Publication Year :
- 2021
- Publisher :
- Nature Portfolio, 2021.
-
Abstract
- Abstract We experimentally investigate a superconducting qubit coupled to the end of an open transmission line, in a regime where the qubit decay rates to the transmission line and to its own environment are comparable. We perform measurements of coherent and incoherent scattering, on- and off-resonant fluorescence, and time-resolved dynamics to determine the decay and decoherence rates of the qubit. In particular, these measurements let us discriminate between non-radiative decay and pure dephasing. We combine and contrast results across all methods and find consistent values for the extracted rates. The results show that the pure dephasing rate is one order of magnitude smaller than the non-radiative decay rate for our qubit. Our results indicate a pathway to benchmark decoherence rates of superconducting qubits in a resonator-free setting.
- Subjects :
- Physics
QC1-999
Electronic computers. Computer science
QA75.5-76.95
Subjects
Details
- Language :
- English
- ISSN :
- 20566387
- Volume :
- 7
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- npj Quantum Information
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.1515629cfdc4b57ae3ac2644563f262
- Document Type :
- article
- Full Text :
- https://doi.org/10.1038/s41534-021-00367-5